웹소켓 오류
websocket connection to 'wss failed 이런게 계속 났음
websocket connection to 'wss failed
근데 http_port를 80, https_port를 443으로 바꾸니 됨
관련 링크
https://stackoverflow.com/questions/32693376/websocket-connection-on-wss-failed
https://stackoverflow.com/questions/34132419/websocket-connection-to-wss-failed-error-in-connection-establishment-n
Docker 로그 보는 법